Fire alarm



PatentedSept. 26, 1922.

2 SHEETS-SHEET l.

E. H. FIELD.

FIRE ALARM.

APPLICATION l-HED APR I. 1921.

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E. H. FIELD.

'FIRE ALARM.

APPLICATION FILED APR 1. 1921.

Patented Sept. 26, 1922.

2 SHEETSSHEET 2.

Patented Sept. 26, 1922.

' UNITED STATES PATENT GFFIQFE,

ELIGAH H. FIELD, OFBUFORD, GEORGIA, ASSIGNOR OE ONE-HALF TO JAMES T. SCALES, OIE BUFORD, GEORGIA. v

. FIRE ALARM.

' Application filednprfl 1, i921. Serial no. 457,614.

To all whom it may concern q Be it known that I, ELIGAH H. FIELD, a citizen of the United States, residing at Buford, in the county of Gwinnett and State of Georgia, have invented a new and useful Fire Alarm, of which the following is a specification.

This invention relates to alarm systems and more particularly to automatically controlled fire alarms, it being the primary object of the invention to provide a novel means for causing an alarm to be sounded in the various rooms throughout a building, if a fire occurs in any room of the building in which an alarm is positioned.

A further object of the invention is to provide a novel means for connecting a plurality of alarms, whereby the operation of one alarm will operate to actuate the associated alarms.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings Figure 1 is a vertical sectional view through rooms of a building disclosing the alarms as applied to the ceilings thereof.

Figure 2 illustrates a detail view of an alarm disclosing the actuating means.

Referring to the drawings in detail, the device includes a plurality of alarms indicated at 5, which alarms are of well known constructions, and embody a pivoted control- .ling lever 6 which operates to release a spring controlled tapper employed for sounding the alarm.

The controlling lever 6 of the alarm of compartment A, is held in its neutral position as by means of the coiled springs 7 and 8, which coiled springs have connection with the controlling lever 6 as by means of the fusible connections 9'.

Having connection with one end of the coiled spring 8, is a fusible link 10, which normally holds the spring 8 in an expanded position to pl'ace'the same under tension, the link 10 being shown as anchored to one wall of a room as by means of the fusible cord 11.

The spring 7 which also has connection with the controlling lever 6, has connection with a fusible link. 12, which link connects with the fusible link 13 of the adjacent room, as by means of the fusible cord 1 1, which is shown as passing through the guard 22 and over suitable pulleys indicated at 15, disposed in the rooms or compartments adjacent to the ceilings thereof.

The fusible link18 has connection with the coiled spring '16 which in turn connects with the controlling lever 6 of thealarm associated therewith, which coiled spring 16 being under tension will operate to move the controlling lever 6 in onedirection should the equalizing spring, which also has con nection with the controlling lever 6 at the opposite side thereof become releasedfrom its anchorage.

Associated with the spring 16 is the equalizing spring 17 that also has connection with the controlling lever associated with the coiled spring 16, and this coiled spring 17 has connection with the alarm positioned in the adjacent upper room, through the fusible cord 18 and fusible link 1.9.

It might be further stated however that the controlling lever 6 of each alarm is provided with a bifurcated extremity 20 and that the fusible cords: 9, which have connection therewith through the medium of the links 21, are positioned over the furcations.

Due to the connection between the cords 9 direction, the links 21 will become disconnected from the controlling lever.

In the operation of the device, assuming that a fire is startedin compartment A, and the fusible link 10 or cord 11 is burned. The coiled spring 7 being under tension, moves the controlling lever 6 of the alarm associated therewith laterally, setting off the alarm. The tension of the coiled spring 7 also causes the link 21 to slide off of the controlling lever which permits the tension of the spring 16 to draw the fusible cord 14,. which results in the coiled spring 17 moving the controlling lever of the alarm associated therewith, setting off this alarm. I

While I have shown and described adjacent rooms as provided with the alarms,

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being such as to cause an alarm to be sounded in each of the various rooms, when a fire takes place in any of the other rooms of the building.

Having thus described the invention, what is claimed as new is In combination with an alarm including a pivoted controlling lever having a bifur cated extremity, fusible cords having links secured thereto, said links being positioned over opposed furcations of the lever, coiled spring members having connection with the respective fusible cords, and disposed on opposite sides of the alarm the spring members being of equal tensions to normally hold the 15 controlling lever in its inactive position, and means having connection with the spring members for normally holding the spring members under tension.

In testimony that I claim the foregoing 20 as my own, I have hereto aflixed my signature in the presence of two witnesses.

ELIGAH H. FIELD.

Witnesses: v

IVY E. SIMPSON, J. R. PATTIsoN. 

